As the developer of the software, we only charge the price that is stated on our website. There are some specific situations that may cause you to have an additional charge added.1) Download Protection Service which is offered by MyCommerce, in case customers forget or lose the registration when they need to re-install the program.2) Purchasing online may still charge tax, this depends on your local law, please fill out an on-line order to check if the tax applies to your region.If you have any more concerns, contact us for more information and assistance.